Stephen A. Makin

[Stephen Makin] Aristotle draws two sets of distinctions in Metaphysics 9.2, first between non-rational and rational capacities, and second between one way and two way capacities. He then argues for three claims: [A] if a capacity is rational, then it is a two way capacity [B] if a capacity is non-rational, then it is a one way capacity [C] a two way capacity is not indifferently related to the opposed outcomes to which it can give rise I provide explanations of Aristotle's terminology, and of how [A]-[C] should be understood. I then offer a set of arguments which are intended to show that the Aristotelian claims are plausible. \\\ [Nicholas Denyer] In De Caelo 1: 11-12 Aristotle argued that whatever is and always will be true is necessarily true. His argument works, once we grant him the highly plausible principle that if something is true, then it can be false if and only if it can come to be false. For example, assume it true that the sun is and always will be hot. No proposition of this form can ever come to be false. Hence this proposition cannot be false. Hence it is necessarily true, and so too is anything that follows from it. In particular, it is necessarily true that the sun is hot. Moreover, if the sun not only is and always will be hot, but also always has been, then it follows by similar reasoning that the sun not only cannot now fail to be hot, but also never could have failed. Anything everlastingly true is therefore, in the strictest sense of the term, necessarily true

In this paper I offer a new interpretation of Melissus' argument at DK 30 B8. In this passage Melissus uses an Eleatic argument against change to challenge an opponent who appeals to the authority of perception in order to support the view that there are a plurality of items in the world. I identify an orthodox type of approach to this passage, but argue that it cannot give a charitable interpretation of Melissus' strategy. In order to assess Melissus' overall argument we have to identify the opponent at whom it is aimed. The orthodox interpretation of the argument faces a dilemma: Melissus' argument is either a poor argument against a plausible opponent or a good argument against an implausible opponent. My interpretation turns on identifying a new target for Melissus' argument. I explain the position I call Bluff Realism (contrasting it with two other views: the Pig Headed and the Fully Engaged). These are positions concerning the dialectical relation between perception on the one hand, and arguments to counterperceptual conclusions on the other. I argue that Bluff Realism represents a serious threat from an Eleatic point of view, and is prima facie an attractive position in its own right. I then give a charitable interpretation of Melissus' argument in DK 30 B8, showing how he produces a strong and incisive argument against the Bluff Realist position I have identified. Melissus emerges as an innovative and astute philosopher